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EWG's Tap Water Database — 2019 UPDATE

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Simazine

Hilo

Simazine is a hormone-disrupting herbicide related to atrazine. It affects the male and female reproductive systems. In studies of laboratory animals, simazine increases blood levels of estrogen, decreases prolactin and progesterone, and causes mammary and ovarian tumors.

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013N/A00N/A
2014ND80ND
2015N/A00N/A
2016ND80ND
2017ND100ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for simazine was defined by EWG based on epidemiological studies of human exposure to atrazine in drinking water. This health guideline protects against harm to the developing fetus, harm to the reproductive system and hormone disruption.

EPA Maximum Contaminant
Level (MCL) 4 ppb

The legal limit for simazine, established in 1992, was based on toxicity studies in laboratory animals conducted in the 1980s. This limit does not fully protect against harm to the reproductive system, harm to the developing fetus, and hormone disruption.

ppb = parts per billion

All test results

Date Lab ID Result
2012-04-302012050030010S1ND
2012-04-302012050030010S2ND
2012-04-30201205030005ND
2012-04-30201205030017ND
2012-10-15201210170604ND
2012-10-15201210170563ND
2012-10-15201210170562ND
2012-10-15201210170553ND
2014-01-22C14-01-0067ND
2014-01-22C14-01-0066ND
2014-01-22C14-01-0065ND
2014-01-22C14-01-0064ND
2014-04-01C14-04-0098AND
2014-04-01C14-04-0099ND
2014-04-01C14-04-0100ND
2014-04-01C14-04-0101ND
2016-02-22ND
2016-02-22ND
2016-02-22ND
2016-02-22ND
2016-06-01ND
2016-06-01ND
2016-06-01ND
2016-06-01ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-05-09ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-08-16ND